arm64: zynqmp: Rename i2c?-gpio to i2c?-gpio-grp

Anything ending with gpio/gpios is taken as gpio phande/description which
is reported as the issue coming from gpio-consumer.yaml schema.
That's why rename the gpio suffix to gpio-grp to avoid name collision.

Link: https://lore.kernel.org/r/94f633e26b7b16cabddb8c7210c2e79208c364da.1704728353.git.michal.simek@amd.com


Signed-off-by: Michal Simek <michal.simek@amd.com>